Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9661691 | System and method for induction heating a helical rotor using a coil | James Coulas | 2017-05-23 |
| 9334908 | Centrifugal backspin brake | Gary Tickner | 2016-05-10 |
| 8723088 | System and method for induction heating a helical rotor using a coil | James Coulas | 2014-05-13 |
| 6725610 | Window seal construction | Colin Murphy, Wei Chak Joseph Lam, David Landsburgh, Charles Phillips | 2004-04-27 |
| 6564911 | Braking assembly | — | 2003-05-20 |
| 6354824 | Ceramic hardfacing for progressing cavity pump rotors | — | 2002-03-12 |
| 6155347 | Method and apparatus for controlling the liquid level in a well | — | 2000-12-05 |
| 6039115 | Safety coupling for rotary pump | — | 2000-03-21 |
| 5881814 | Apparatus and method for dual-zone well production | — | 1999-03-16 |
| 5882043 | Roof drain adapter | Colin Murphy | 1999-03-16 |
| 5709059 | Fastener for cementitious substrate | Colin Murphy, Mark Reichlin, Steven Bunn, Charles Phillips | 1998-01-20 |
| 5697768 | Downhole swivel | — | 1997-12-16 |
| 5645896 | Method of applying a filled in metal carbide hard facing to the rotor of a progressing cavity pump | — | 1997-07-08 |
| 5639227 | Seal arrangement for the drivehead of a downhole rotary pump | — | 1997-06-17 |
| 5631961 | Device for and method of cryptography that allows third party access | Mark R. Unkenholz, Mark Wilson, John E. Burroughs | 1997-05-20 |
| 5551510 | Safety coupling for rotary down hole pump | — | 1996-09-03 |
| 5498142 | Hardfacing for progressing cavity pump rotors | — | 1996-03-12 |
| 5370179 | Drive head for rotary down hole pump | — | 1994-12-06 |
| 5358036 | Safety disc brake assembly | — | 1994-10-25 |
| 5327961 | Drive head for downhole rotary pump | — | 1994-07-12 |